Thermal Monitoring of Major Active Volcanoes Worldwide by Synergetic Merge of High- and Low-resolution payloads ASTER, ETM+, TM and MODIS

摘要

We present here a solution to thermal volcano monitoring, based on the synergetic merge of up to four multispectral payloads and the use of ad-hoc developed computing routines "MyVOL" and "MyMOD". The latter, are based on auto-adaptive, automated processes involving high-resolution SWIR-TIR and low-resolution MIR-TIR radiances. Both routines were tested on large and dense eruptive data sequences, acquired between 2000-2005 on Piton de la Fournaise, Reunion Island (NW Indian Ocean), Kilauea (Hawaii), Mt. Etna and Stromboli (Italy). Instantaneous effusion rate values obtained from ASTER, TM, ETM+ and MODIS are compared each other and to ground measured data, whereas cooling lava flow maps obtained by ASTER and Thematic Mapper are compared to published flow maps. Overall, the work involved the combined processing of more than 130 high-resolution ASTER, ETM+ and TM scenes, and as much as 800 low-resolution MODIS scenes acquired by both Terra and Aqua.